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Cement is said to be responsible for 8% of global carbon emissions. In the search for an alternative, more sustainable construction material, building companies in Ghana and other African countries are reviving an ancient technique called ‘rammed earth’. Daniel Dadzie, a Â鶹Éç reporter from Ghana, explains how you make it and why it’s seen as a greener option. Architect and academic Kuukuwa Manful explains the history of rammed earth and how European colonial authorities discouraged indigenous African building styles.

Also: Fardowsa Osman, a Â鶹Éç Somali reporter, describes the effect of the floods in Somalia and Â鶹Éç Meteorologist Tomasz Schafernaker explains the two weather patterns that contributed to the devastation.

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Presenter: Hannah Gelbart
Producers: Alex Rhodes, Benita Barden and Julia Ross-Roy
Editors: Verity Wilde and Simon Peeks